Answer the questions, so it guides you towards the right team to help you. Apply the drop downs and you will get a phone number specified to your question (ie - support, care):
- I want to talk to someone. How do I phone you? - https://bit.ly/2SFUDdG
when I call up an existing tax return all the boxes in the income are blank until I click on an empty box then they appear.
It also shows and error in my entering from my T4A(OAS)j amount as it says I have put in an amount higher than the maximum allowed.